Initial Commit

Assets/Scripts/Systems/Items/HealthPackUseSystem.cs

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+using Events;
+using Items;
+using Unity.Entities;
+using UnityEngine;
+
+namespace DefaultNamespace
+{
+	public class HealthPackUseSystem : ItemUseSystemAbstract<HealthKitItem>
+	{
+		public override ItemUseFlags Flags => ItemUseFlags.UseOnlyInteractive | ItemUseFlags.UseOnlyGrounded;
+
+		public override ItemUseType UseType => ItemUseType.HealthPack;
+
+		public override bool IsAdditiveUsage => false;
+
+		protected override void Use(HealthKitItem prefab, ref ItemData itemData, Entity user, Entity inventory)
+		{
+			var facade = entityManager.GetComponentObject<PlayerFacade>(user);
+			var actorData = entityManager.GetComponentData<ActorData>(user);
+
+			actorData.Health = Mathf.Min(actorData.Health + prefab.Health, facade.MaxHealth);
+			itemData.Amount--;
+
+			entityManager.SetComponentData(user, actorData);
+			entityManager.PostEntityEvent<InventoryDirtyEventData>(user);
+		}
+
+		protected override bool Validate(HealthKitItem prefab, Entity user, Entity inventory)
+		{
+			if (!entityManager.HasComponent<ActorData>(user))
+			{
+				return false;
+			}
+			var playerFacade = entityManager.GetComponentObject<PlayerFacade>(user);
+			if (playerFacade == null)
+			{
+				return false;
+			}
+			var actorData = entityManager.GetComponentData<ActorData>(user);
+			return actorData.Health < playerFacade.MaxHealth;
+		}
+
+		public override Sprite GetItemIcon(HealthKitItem prefab)
+		{
+			return prefab.UseItemIcon;
+		}
+	}
+}